The player controls Chell from a first-person perspective while running and jumping to completing various puzzles. She is able to withstand large drops, but can be killed by falling in the toxic water of the facility, crushed to death, burnt to death, or shot to death by turrets.

To do this glitch you must enable the dev console put in svcheats 1 and use noclip any challenge and get to the end then turn noclip off svcheats 0 and saveload the file and GLITCH TASTIC you are closer to getting the achevement